Catalytic converter restoration
Restoration means cleaning a clogged catalytic converter or DPF instead of replacing it. At our workshop in Riga we first find the cause and check the part. If the ceramic is cracked or melted, we will tell you honestly and suggest another route.
Prices
We confirm the exact price after diagnostics, before any work starts.
Restore or replace
When restoration helps - and when it does not
The converter or DPF is not always the culprit. The table shows the most common situations and what we do in each.
Situation: DPF clogged with soot or ash: the DPF light is on, power drops, the car goes into limp mode
Assessment: Most likely restorable
What we do: We check the sensors and pipes and try a forced regeneration; if that is not enough, we clean the filter.
Situation: Catalyst efficiency below threshold, no other symptoms
Assessment: Needs an in-person check
What we do: First we rule out exhaust leaks, the oxygen sensors and software. If deposits are the problem, restoration can bring the efficiency back.
Situation: The code points to an oxygen sensor or the DPF pressure sensor
Fault codesP0136 P0137 P0141 P2452
Assessment: Most likely not the catalytic converter
What we do: Diagnostics and a sensor or wiring repair - the converter itself is most likely fine.
Situation: Misfires, a flashing Check Engine light, a rich mixture, the engine burns oil
Fault codesP0300-P0306 P0172
Assessment: Fix the cause first
What we do: We fix the misfire or oil consumption first and only then assess the converter - otherwise the cause will damage a restored or new part too.
Situation: Rattling, a broken or melted monolith, cracked ceramic
Assessment: Not worth restoring
What we do: After checking the pipes: if the ceramic is damaged, cleaning will not restore it - we recommend a replacement part or a new one, and we can buy your old converter.
The table is a general guide, not a diagnosis. The final decision is made by our technician after inspection and measurement.
Check your caseCost and result
Restoration or a new part
Restoration
- Works when deposits are the problem and the ceramic is intact
- The original part stays on your car
- We check the condition before cleaning and the flow after it
New part or replacement
- Needed when the ceramic is cracked, melted or broken
- We match a replacement by size and vehicle parameters
- You can sell us your old converter
Process
How restoration works
Four steps at our workshop in Riga. You know about each one in advance.
- 1
Diagnostics
We read the fault codes and check the sensors, pipes and exhaust leaks. If the problem is not the converter or filter, we tell you before any work.
- 2
Condition check
We safely remove the part, check its condition and choose the right cleaning mode.
- 3
Three-stage cleaning
In a professional machine - for DPFs the OTOMATIC DPF Platinum AI: dry blowing, washing with a solution under pressure, drying and blowing.
- 4
Flow check and refitting
We check the flow and operation, refit the part and hand you a cleaning report.
OTOMATIC DPF Platinum AI · 3 stages
- 1/3
Dry blowing
Loose soot and ash are blown out with air.
- 2/3
Washing
A solution under pressure flushes deposits out of the channels.
- 3/3
Drying and blowing
The filter is dried and blown again so no moisture stays in the channels.
Before and after
Open channels, not a new part
Cleaning flushes soot and ash out of the filter channels. It cannot repair cracks or melted ceramic - we will tell you that at the diagnostics stage.
BeforeAfterWhat you get
Work you can verify, not promises
Cleaning report
Before cleaning we check the condition of the part, after cleaning we check the flow and hand you a report on the work done.
OTOMATIC DPF Platinum AI
We clean DPFs in a professional machine in three stages: dry blowing, washing with a solution under pressure, drying.
Roadworthiness test 2026
Since 1 January 2026 the CSDD test measures particles on diesel cars (up to 3.5 t) first registered from 2013. A removed or damaged DPF fails.
Cabinet Regulation No. 295, Annex 1, 8.2.2.3Workshop in Riga
Jūrkalnes iela 62, box A7. We remove, clean and refit the part in one place.
FAQ
Questions about restoration and fault codes
P0420 P0430 P2002 P244A P244B P2463 P0136 P0141
All fault codes →P0420 (bank 1) and P0430 (bank 2) mean the catalyst efficiency is below threshold. That is not always a failed converter: first rule out exhaust leaks, an ageing oxygen sensor, software, misfires and oil burning. If deposits are the problem, restoration can bring the efficiency back.
We do not promise that in advance. Cleaning helps when the problem is deposits, not thermal or chemical damage. The flow check before and after cleaning shows the result.
P244B means the DPF pressure difference is too high, P2463 means soot has built up in the filter. In both cases the filter can often be restored: we check the sensors and pipes, try a forced regeneration and only then clean it.
P2002 means the DPF efficiency is below threshold, P244A means the pressure difference is too low. The reason can be a crack in the ceramic or disconnected pipes. We check the pipes first; if the ceramic is cracked, cleaning will not help.
No. They point to the oxygen sensor after the converter or its heater circuit. Check the sensor and wiring first - the converter itself is most likely fine.
When it rattles (the inside has broken up), the ceramic is melted or cracked, or it has been poisoned by oil or coolant for a long time. Then we recommend a replacement part or a new one - and you can sell us the old converter.
In Latvia a car without the manufacturer's emission control equipment fails the roadworthiness test (Cabinet Regulation No. 295). Since 1 January 2026 the test also measures particles on diesel cars first registered from 2013, so a removed or damaged DPF fails.
For a passenger car, catalytic converter cleaning costs 120 €, DPF cleaning 120 € and diagnostics before and after cleaning 25 € (excl. VAT). Trucks, buses and machinery, depending on the vehicle type: DPF 200-300 €, catalytic converter 180-300 € - see the price list on the "DPF cleaning" page. We confirm the final price after diagnostics, before any work starts. For comparison: a new DPF can cost 700-1700 € or more.
Not sure what is wrong with your car?
Tick the symptoms or enter the fault code - in 30 seconds you get a first assessment of whether the part can be restored. If restoring is no longer worth it, we buy the old converter.
Request
Book a check or a job
Leave your contact details - we will get back to you, clarify the situation and agree on a time.
- Phone+371 29 007 007
- Phone+371 28 777 998
- WhatsApp+371 20 099 444
- Emailinfo@autokatalizatori.lv
- AddressJūrkalnes iela 62, A7 bokss, Rīga
